JPS6455511A - Zoom lens - Google Patents
Zoom lensInfo
- Publication number
- JPS6455511A JPS6455511A JP21167487A JP21167487A JPS6455511A JP S6455511 A JPS6455511 A JP S6455511A JP 21167487 A JP21167487 A JP 21167487A JP 21167487 A JP21167487 A JP 21167487A JP S6455511 A JPS6455511 A JP S6455511A
- Authority
- JP
- Japan
- Prior art keywords
- group
- lens
- constitution
- power
- object side
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Lenses (AREA)
Abstract
PURPOSE:To excellently compensate aberrations and to obtain excellent optical performance over the entire power variation range by specifying 4th constitution and 5th constitution and making respective lens elements meet specific requirements as to a zoom type lens for focusing, power variation, compensation, luminous flux collimation, and image formation. CONSTITUTION:A group III is arranged successively to groups I and II for focusing which have positive refracting power and negative refracting power to compensate an image plane which varies as the power is varied, a group IV with positive refracting power collimates divergent luminous flux from the group III into parallel luminous flux, and a group V with a fixed image forming function and a fixed stop SP are arranged. The group IV consists of a biconvex lens which as its large-curvature refracting surface on the object side and the group IV consists of six lenses which have large-curvature convex or concave refracting surfaces on the object side in order from the object side. Further, five inequalities hold, where Rij is the radius of a (j)th lens in an (i)th group, Dij the lens thickness of air gap, Fi the focal length of the (i)th group, and FT the focal length of the whole system. With this constitution, the short zoom lens is obtained which has an about 1.4 large aperture ratio and excellent performance.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21167487A JPS6455511A (en) | 1987-08-26 | 1987-08-26 | Zoom lens |
US06/233,486 US4832471A (en) | 1987-08-26 | 1988-08-17 | Zoom lens |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21167487A JPS6455511A (en) | 1987-08-26 | 1987-08-26 | Zoom lens |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6455511A true JPS6455511A (en) | 1989-03-02 |
Family
ID=16609715
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP21167487A Pending JPS6455511A (en) | 1987-08-26 | 1987-08-26 | Zoom lens |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6455511A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0256052A (en) * | 1980-05-30 | 1990-02-26 | Bull Sa | Apparatus for signal transmission between two data processing means |
US7116489B2 (en) * | 2004-09-30 | 2006-10-03 | Sony Corporation | Zoom lens and imaging device |
Citations (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS49900A (en) * | 1972-03-10 | 1974-01-07 | ||
JPS5758111A (en) * | 1980-09-25 | 1982-04-07 | Canon Inc | Optical system having focus detector |
JPS58153913A (en) * | 1982-03-08 | 1983-09-13 | Canon Inc | Zoom lens |
JPS5918919A (en) * | 1982-07-23 | 1984-01-31 | Canon Inc | Zoom lens |
JPS59222807A (en) * | 1983-05-31 | 1984-12-14 | Canon Inc | Zoom lens |
JPS6051813A (en) * | 1983-08-31 | 1985-03-23 | Canon Inc | Zoom lens |
JPS60168114A (en) * | 1984-02-10 | 1985-08-31 | Canon Inc | Zoom lens provided with function for transferring zoom area |
JPS60208723A (en) * | 1984-04-02 | 1985-10-21 | Canon Inc | Fast zoom lens of high variable power |
JPS60230112A (en) * | 1984-04-27 | 1985-11-15 | Asahi Optical Co Ltd | Large aperture compact zoom lens |
JPS60260913A (en) * | 1984-06-08 | 1985-12-24 | Canon Inc | Zoom lens of large aperture ratio |
JPS6120921A (en) * | 1984-07-09 | 1986-01-29 | Canon Inc | Large aperture zoom lens |
JPS6193423A (en) * | 1984-10-12 | 1986-05-12 | Minolta Camera Co Ltd | Larger aperture ratio zoom lens |
JPS61169809A (en) * | 1985-01-23 | 1986-07-31 | Canon Inc | Variable focal length lens |
JPS61182012A (en) * | 1985-02-07 | 1986-08-14 | Minolta Camera Co Ltd | Zoom lens having large aperture ratio |
JPS61259219A (en) * | 1985-05-14 | 1986-11-17 | Canon Inc | Zoom lens |
JPS61259218A (en) * | 1985-05-14 | 1986-11-17 | Canon Inc | Zoom lens |
JPS6291908A (en) * | 1985-10-18 | 1987-04-27 | Konishiroku Photo Ind Co Ltd | Zoom lens |
JPS62170926A (en) * | 1986-01-23 | 1987-07-28 | Konishiroku Photo Ind Co Ltd | Zoom lens |
JPS62173420A (en) * | 1986-01-27 | 1987-07-30 | Canon Inc | Photographing system having refractive index distribution type optical member |
JPS62173421A (en) * | 1986-01-28 | 1987-07-30 | Canon Inc | Zoom lens |
-
1987
- 1987-08-26 JP JP21167487A patent/JPS6455511A/en active Pending
Patent Citations (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS49900A (en) * | 1972-03-10 | 1974-01-07 | ||
JPS5758111A (en) * | 1980-09-25 | 1982-04-07 | Canon Inc | Optical system having focus detector |
JPS58153913A (en) * | 1982-03-08 | 1983-09-13 | Canon Inc | Zoom lens |
JPS5918919A (en) * | 1982-07-23 | 1984-01-31 | Canon Inc | Zoom lens |
JPS59222807A (en) * | 1983-05-31 | 1984-12-14 | Canon Inc | Zoom lens |
JPS6051813A (en) * | 1983-08-31 | 1985-03-23 | Canon Inc | Zoom lens |
JPS60168114A (en) * | 1984-02-10 | 1985-08-31 | Canon Inc | Zoom lens provided with function for transferring zoom area |
JPS60208723A (en) * | 1984-04-02 | 1985-10-21 | Canon Inc | Fast zoom lens of high variable power |
JPS60230112A (en) * | 1984-04-27 | 1985-11-15 | Asahi Optical Co Ltd | Large aperture compact zoom lens |
JPS60260913A (en) * | 1984-06-08 | 1985-12-24 | Canon Inc | Zoom lens of large aperture ratio |
JPS6120921A (en) * | 1984-07-09 | 1986-01-29 | Canon Inc | Large aperture zoom lens |
JPS6193423A (en) * | 1984-10-12 | 1986-05-12 | Minolta Camera Co Ltd | Larger aperture ratio zoom lens |
JPS61169809A (en) * | 1985-01-23 | 1986-07-31 | Canon Inc | Variable focal length lens |
JPS61182012A (en) * | 1985-02-07 | 1986-08-14 | Minolta Camera Co Ltd | Zoom lens having large aperture ratio |
JPS61259219A (en) * | 1985-05-14 | 1986-11-17 | Canon Inc | Zoom lens |
JPS61259218A (en) * | 1985-05-14 | 1986-11-17 | Canon Inc | Zoom lens |
JPS6291908A (en) * | 1985-10-18 | 1987-04-27 | Konishiroku Photo Ind Co Ltd | Zoom lens |
JPS62170926A (en) * | 1986-01-23 | 1987-07-28 | Konishiroku Photo Ind Co Ltd | Zoom lens |
JPS62173420A (en) * | 1986-01-27 | 1987-07-30 | Canon Inc | Photographing system having refractive index distribution type optical member |
JPS62173421A (en) * | 1986-01-28 | 1987-07-30 | Canon Inc | Zoom lens |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0256052A (en) * | 1980-05-30 | 1990-02-26 | Bull Sa | Apparatus for signal transmission between two data processing means |
US7116489B2 (en) * | 2004-09-30 | 2006-10-03 | Sony Corporation | Zoom lens and imaging device |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS575021A (en) | Reverse telephoto type large-diameter wide angle lens | |
JPS55147606A (en) | Telephoto lens | |
JPS56165111A (en) | Telecentric illuminating system | |
JPS6438711A (en) | Zoom lens | |
JPS5734515A (en) | Refracting index type optical system for video projector | |
JPS57161822A (en) | Large aperture ratio lens | |
JPS5655915A (en) | Zoom lens | |
JPS6455511A (en) | Zoom lens | |
JPS5753718A (en) | Zoom lens system | |
JPS6479719A (en) | Telephoto zoom lens | |
JPS5678815A (en) | Refractive optical system of television projection device | |
JPS5774717A (en) | Telephoto lens | |
JPS57130009A (en) | Large-aperture lens | |
JPS57122412A (en) | Reverse telephoto type large aperture wide angle lens | |
JPS57164708A (en) | High resolving power lens | |
JPS572012A (en) | Triplet lens having last diaphragm | |
JPS6474519A (en) | Zoom lens | |
JPS5746223A (en) | Telephoto lens | |
JPS6432214A (en) | Objective lens for optical disk | |
JPS55147605A (en) | Objective lens for video disc | |
JPS56123510A (en) | Telecentric projection lens | |
JPS56158316A (en) | Wide-angle zoom lens | |
JPS57146216A (en) | Modified gauss type photographic lens | |
JPS56165110A (en) | Telephoto lens | |
JPS57148716A (en) | Objective lens for video disk |